Carbureter.



0. KERSTEN.

CARBURETER.

APPLlcATloN FILED DEC. a. 1913.

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OSCAR KERSTEN, 0F BERLIN, GERMANY.

CARBURETER.

Specification of Letters Patent.

Iatented Sept, 26, i916.

Application led December 3, 1913. Serial No. 804,478.

To all v'whom 'it may concern Be it known that I, OSCAR KnRsrEN, asubject of the German Emperor, residing at Turmstrasse 48, Berlin, N.WV., in the German Empire, have invented certain new and usefulImprovements in Carbureters, of which the following is a specification.

This invention relates to spray carbureters of the type in whichadditional air is introduced into the mixture before passing out throughthe throttle, the admission of said additional air being regulated bythe rotation of one cylindrical member in relation to the other so thatsimilar ports in each register more or less according to therequirements of the engine;` and has for its object to provide improvedmeans whereby such additional air can be conveyed to the mixture, beforeit reaches the throttle, in the form of vortices and therefore in ainely divided state.

My invention consists in constructing a carbureter as hereinafterdescribed and as particularly pointed out in the appended claims.

I ,will now describe my invention vwith reference to the accompanyingdrawing which illustrates an embodiment of my invention.

In the upper portion a of the carbureter, the throttle valve d ismounted on the the screw g. It is controlled by the lever e.

The upper portion which is formed as a preliminary heater, is secured onthe lower portion o by means of four screws Q. The lower portion isformed as a fuel reservoir in which the float 7L is provided. VFuel issupplied to the reservoir through' the conduit p, fn, s. The supply iscontrolled bythe needle which is raised or lowered by the lever tpivoting about the point e. From the fuel reservoir a conduit leads tothe fuel nozzle i the cross-section of the outlet of which is adjustableas desired by. the screw Ic. The fuel leaves the reservoir, enters thenozzle and is carried away by the drawn-in air. Between the upperportion a and the lower portion b the middle portion c is provided,which carries the controller y of the additional air supply. The latterconsists of a plurality (for instancel 3) of concentric rings formedwith apertures, and which are relatively staggered. The air thereforedoes not reach directly the fuel-air mixture but strikes the variousrings and becomes finely divided. The additional air is supplied underall conditions in such quantities that the fuel-air mixture is alwaysapproximately of the same composition. The rings may be mounted atdifferent distances apart (for instance, l, 2, or 3 mm). The resistanceoffered by the rings, produces a uniform admission of air and a moreintimate mixture with the mixture coming from the sprayer.

The main advantage of the present arrangement resides in the fact thatmovable parts such asfballs, valves or the like are f avoided, whichcould easily give rise to ununiform operation of the engine.

Upon the outermost ring of the additional air controller a rotary valvey2 is mounted; being formed with the same number of apertures as thering inclosed by it. By displacing the valve, the apertures formed atthe outer edge of the additional air controlled, Y

are partly coveredand the current of air is thus controlled. Thedisplacement of the ring can be e'ected from the exterior by means ofthe arm y.

What I claim and desire to secure by Let ters Patent of the UnitedStates is zl. In a carbureter comprising an upper portion containing thethrottle valve, an intermediate portion for supplying secondary air tothe mixture before it passes to the throttle and a lower portioncontaining a fuel reservoir and centrally thereof a primary air inletand a fuel nozzle, means for supplying a quantity of nely dividedsecondary air comprising a plurality of` concentric rings, said ringskbeing spaced apart, and each ring being formed with openings, which arerelatively staggered.

2. In a carbureter comprising an upper portion containing the throttlevalve, an intermediate portion for supplying secondary air to themixture before it passes to the throttle and a lower portion containinga OSCAR VKERSTEN.

fuel reservoir and centrally thereof a primary air inlet and a fuelnozzle, means for supplying a quantity of finely divided seeondary aircomprising a plurality of stationary concentric ringshaving openingswhich are relatively staggered, said rings being arranged at diiferentdistances apart, a perforated cylindrical Valve surrounding VitnessesHENRY HASPER, VOLDEMAR HAUPT.

Unpies of this patent'may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

